Leviticus 15:31-33

31 Thus shall ye separate the children of Israel from their uncleanness; that they die not in their uncleanness, when they defile my tabernacle that is among them. 32 This is the law of him that hath an issue, and of him whose seed goeth from him, and is defiled therewith; 33 And of her that is sick of her flowers, and of him that hath an issue, of the man, and of the woman, and of him that lieth with her that is unclean.